Bobbin

ABSTRACT

A yarn collecting bobbin comprising an elongated, tapered tube having a frustro-conical skirt affixed thereto is disclosed. The skirt encircles generally the base section of the bobbin, with a relatively short extension from the tube projecting beyond the lower end of the skirt. The skirt is firmly secured to the tube by any of several different techniques and is notched so as to entrain a yarn end adjacent thereto and commence winding of the yarn on the bobbin.

United States Patent [191 Kilduff v v [111 3,790,100 [451 Feb.5, 1974 BOBBIN [75] Inventor: Herbert Kilduff, Warwick, R1.

[73] Assignee: Leesona Corporation, Warwicke,

[22] Filed: -May 21, 1971 [21] Appl. No.: 145,726

[52] US. Cl 242/118.32, 242/18 PW, 242/125.1 [51] Int. Cl B65h 75/10, B65h 75/28 [58] Field of Search242/l25.l, 125.2, 118.3, 118.31, 242/1 18.32, 18 PW, 18 EW; 57/34 T1", 118.6,1l8.61,118.7,118.8,118.4

[56] References Cited UNITED STATES PATENTS 1,980,311 11/1934 Anderson 242/1 18.31 2,049,558 8/1936 2,347,376 4/1944 2,565,562 8/1951 2,624,525 l/1953 Dunlap 242/11 8.32

2/1971 Bell et a1 242/125.1

FOREIGN PATENTS OR APPLICATIONS 627,506 8/1949 Great Britain 242/11s.3 54,163 11/1890 Germany 242/11 8.31

Primary ExaminerGeorge F. Mautz Attorney, Agent, or Firm-Albert P. Davis; Burnett Norton [57] 1 ABSTRACT 5 Claims, 5 Drawing Figures PATENTEDFEB 1914 I 3.790100 654/ E50 F 5 INVENTOR.

HERBERT K'ILDUFF ATTORNEY BOBBIN The present invention relates to a yarn collecting bobbin and relates, more particularly, to a new and novel yarn collecting bobbin comprising an elongated, tapered tube having a generally frustro-conical skirtattached thereto, an extension depending below the skirt to take up residual yarn. As used herein the term yarn" means any type of attenuated material either textile or otherwise, and-the term bobbin is employed in a generic sense as applying to any type of yarn receiver.

Bobbins of various configurations, and constructed of various materials are well known in the art. These bobbins usually have a hole bored through the length thereof by which the bobbin can be placed on a spindle, skewer, etc. for rotation therewith. The bobbins are used to hold roving, yarn, thread, etc., which is wound into yarn packages thereon inconsequence of the processing of the yarn on any of a variety of machines, such as spinning machines or twisting machines, for example. The type of bobbin selected for any given windup operation will depend upon factors such as the size and shape of the yarn package desiredand upon the ultimate use of the package. With the advent of automatic tending mechanism for spinning frames and the like as disclosed in'U.S. Pat. No. 3,403,866 it has become desirable to provide a low cost bobbin comprising an elongated, tapered tube having a frustro-conical skirt affixed thereto and having a yarn engaging portion projecting beyond the lower end of the skirt. As is fully disclosed in the above-cited patent, and with particular reference to the specific ring rail traverse motion described therein, these so-called skirted bobbins contribute to the production of cylindrical yarn packages adapted for over-end unwinding.

Customarily skirted bobbins are unitary devices wherein the barrel of the bobbin and the skirt are formed by molding plastic; material. While these unitary plastic skirted bobbins appear to meet some of the needs of the textile industry, nevertheless, such plastic bobbins are, among other things, rather expensive to manufacture. With the recognition that presently in. the textile industry-there exists immense quantities of elongated, slender, hollow tubular bobbins of the type customarily' employed to wind up yarn on spinning and twisting machines and the like, and, further, there presently is capacity for the production of vast quantities more of these tubular bobbins, it becomes evident that the production of a skirted bobbin adapted from these tubular bobbins is a highly desirable product for use of modern day equipment such as the automatic tending mechanism alluded to above.

Accordingly, the present invention is directed to the provision of a skirted bobbin incorporating an elongated barrel or tubular portion with the tubular portion having a slight taper over its full length, the taper being such that the diameter of the tubular portion increases from apex to base. This elongated tubular portion conforms to the present day tubular bobbins for spinning and twisting machines .and the like discussed above. In accordance with the present inventiona skirt is affixed on the tubular portion and encircles generally the base end of the tubular portion. However, a short extension from the tubular portion projects below the lower end of the skirt. These bobbins are relatively inexpensive to manufacture, are easy to balance and maintain their balance over long continued use, and are admirably suited for use with mechanisms operable to commence winding of yarn on the bobbin automatically.

OFJECTS OF THE INVENTION It is an object of the invention to provide a skirted yarn collector or bobbin which is suitable for use on conventional textile machines.

Another object of the present invention is to provide a skirted bobbin wherein a skirt is attached to an elongated conical portion in a rapid andefficient manner contributing to a bobbin which is economical and easy to manufacture.

Still a further object of the invention is to provide a skirted-bobbin wherein the bobbin includes an elongated tube onto which a skirt is suitably affixed and wherein an extension is provided on the bobbin at the base thereof for collecting residual yarn.

Other objects of the invention will, in part, be obvious and will,in part, appear hereinafter.

DESCRIPTION OF THE DRAWING FIG. 3 is a detailed view of the bobbin of FIGS. 1 and 2 illustratingone means of affixing the skirt onto the elongated, tapered tube; and

' FIGS. 4 and 5 are views similar to FIG. 3 and illustrating alternate means of affixing the skirt to the tube.

DESCRIPTION OF THE PREFERRED I EMBODIMENT r With particular attention now to the drawing and referring initially to FIG. 1, bobbin 10 is illustrated as seated fast on a rotatable spindle 12 of a conventional multispindle ring spinning machine 14. The spinning machine 14 is constituted as an elongated frame having a plurality of additional spindles in alignment with spindle 12. Said machine 14 also includesthe customary reciprocating ring rail 16 which extends substantially the full lengthof the machine and which mounts a plurality of rings 18 thereon, one for encircling each spindle l2 and its associated bobbin 10. A traveller 20 rides on the upper flange of each ring 18 and engages yarn Y to thus guide the yarn onto the bobbin for winding up. Although, as stated above, spinning machine 14 has a plurality of spindles 12, only one spindle is illustrated herein, it being understood that the remaining spindles will be identical with that shown and described herein.

to C. C. Bell and K. W. Niederer issued Oct. 1, 19,68,

the tender being shown .fragmentarily at 22,. In accordance with its operation as set forth in the cited patent,

shown in FIG. 1.

The bobbin of the present invention as illustrated includes an elongated generally cylindrical tube 28 having opposite apical and base ends 29 and 30, respectively. Tube 28 may be of the type presently employed on conventional textile machines for taking up yarn which has been twisted and the like, and manufactured of paper wood, for example. Tube 28 is provided with an elongated bore- 32 extending through the full length thereof. The upper and lower ends of spindle l2 engage with suitable bearing surfaces at the apical and base ends 29 and 30, respectively, of bobbin to thus rotate the bobbin when the spindle is driven. Tube 28 is tapered along its full length to thus have 'a relatively small diameter at apical end 29 and a relatively larger diameter at base 30. The region intermediate the apical and base ends of tube 28 has a rigid skirt 34 of generally frustro-conical configuration affixed fast thereon and, more particularly, the skirt is positioned in the lower region of tube 28 below the midpoint of the axial length of the tube and toward base end 30. As best seen in FIGS. 3-5 skirt 34 thereof does not terminate in the same plane as the base 30 of tube 28 but, rather, a short section or extension 36 of the tube projects below the lower end of the skirt. Skirt 34 may be constructed of a thermoplastic material capable of being molded on the tube, if desired as, for example, in the manner particularly described in reference to FIGS. 3 and 4. Extension 36 provides a surface on which any residual yarn withdrawn from nozzle 24 can wrap as the yarn commences to wind on bobbin 10. The lower, outer terminus of skirt 34 is configured as a cylindrical surface 39 which is concentric with but substantially larger in diameter than tube 28. The surface of skirt 34 which is tapered is desirably abraded or covered with a-suitable frictional material to preclude the coils of yarn wrapped thereon from slipping off that surface.

With continuing reference to FIGS. 3-5, it will be seen that the skirt 34 is constituted as a pair of circular walls which are spaced apart over the major portion of their lengths. The inner wall 40 of the skirt has an internal diameter which defines bore 32 which is tapered to correspondv to the taper at that portion of the outside diameter of tube 28 where the skirt is to be gripped thereon. The outer wall 42 of the skirt, while being integral with wall 40 in the area of annular section 44, diverges outwardly therefrom as it extends toward base 30. At their outer ends, remote from section 44, walls 40 and 42 are joined together by va series of equally spaced ribs 46 to thus present rigidity to the inner and outer walls of the skirt at their outer extremities.

In contemplation of its use with a ring spinning machine, the bobbin 10 will have yarn wraps placed on the surface of the skirt 34 and also on the surface of bobbin l0. Yarn Y is initially entrained on the bobbin by its engagement in a notch 48 (FIGS. 1 and 2) which may be one of a series of such notches formed in the lower end wall of the skirt wall 42. During this entrainment the residual yarn which is held in suction nozzle 24 is pulled out and caused to wrap on extension 36 of the bobbin. This prevents the residual yarn from wrapping about spindle 12 where it must be removed, usually by hand with concomitant inoperation of the spindle.

It has already been explained that skirt 34 is connected to tube 28 so that these two elements form a unitary structure. Such connection is provided in part by the frictional grip provided as skirt 34 is fitted on tube 28 with the tapered bore 32 in mating engagement with the tapered outer diameter of the tube. However, it is desirable to provide a further interlock between the skirt and tube to secure the two components together. With particular reference now to FIG. 3 tube 28 is provided with a plurality of holes 50 therethrough. Skirt 34 is molded in place on tube 28 and, in the course of molding the molten plastic is permitted to flow into the holes, thereby securing skirt 34 in'position on tube 28 and prohibiting an axial or rotary movement of the skirt relative to the tube. A wear-resistant ferrule 52 of metal, for example, may be affixed to and encircling the base end 30 of tube 28 to prevent undesirable wear on the tube at said lower end.

In the embodiment of FIG. 4, tube 28 has a metal ferrule 54 positioned to seize and encircle the base end 30 of tube 28. Ferrule 54 includes an'elongated, annular, outer wall 56 which mates with the outerside oftube 28 and extends upwardly from end 30. The upper end of ferrule 54 is turned outwardly so as to form a rim or flange 58. It will be appreciated that flange 58 could also be constituted as one or a series of spaced outwardly extending tabs. With ferrule 54 so positioned, skirt 34 is molded into place on tube 2 8 with the molten plastic material flowing around flange 58. With skirt 34 thus interlocked with ferrule 54, the skirt is precluded from movement relative to tube 28.

Viewing FIG. 5 where a further embodiment of the invention is shown, skirt 34 is provided with a relief 60 at the lower end of its inner wall 44. At the upper end of the relief 60 an annular seat 62 is molded in the wall 44. The'lower end of tube 28 is fitted with a ferrule 64 of metal or the like, of essentially the same configuration of the ferrule described in connection withthe embodiment on FIG. 4. That is, the lower end on ferrule 64 is wrapped about the base end 30 of tube 28 to lock in engagement therewith. An elongated, annular, outer wall. mating with the outside of tube 28 extends upwardly and terminates in a rim or flange 68 which is sufficiently resilient to deflect so that skirt 34 may be slid along tube 28 from the apical. end 29 thereof and push over flange 68 until the flange engages in seat'62 when skirt 34 is thus secured on flange 68, said skirt will be secured in a fashion precluding rotary or axial motion thereof relative to tube 28. If desired, the outer edge of flange 68 may be toothed or serrated to assist in preventing rotary motion of the skirt relative to the tube.

Since certain changes may be made in the above apparatus without departing from the scope of the invention herein involved it is intended that all matter contained in the above description as shown in the accompanying drawing shall be interpreted as illustrative only and notin a limiting sense.

What is claimed is:

1. A bobbin for receiving strand material comprising, an elongated generally tubular member having an apical end and a base, an element of thermoplastic material formed around said member at a locus intermediate said apical end and said base while said material is in a molten state, said element when so formed on said member having an inner hub with a bore therethrough mated with said member and an outer wall encircling said hub, said wall being connected with said hub and providing a zone of enlarged diameter around said member, and engaging means on said tubular member for engaging with said material while in its molten state to thereby secure said element on said member at said locus and prevent movement of said element relative to said member, said engaging means including a ferrule engaged at a first of its ends with the base of said member and engaged at its end opposite from said first end 5. A device as set forth in claim 1 wherein said opposite end of said ferrule is flared outwardly to form a flange for engagement with said thermoplastic material as said hub is formed. 

1. A bobbin for receiving strand material comprising, an elongated generally tubular member having an apical end and a base, an element of thermoplastic material formed around said member at a locus intermediate said apical end and said base while said material is in a molten state, said element when so formed on said member having an inner hub with a bore therethrough mated with said member and an outer wall encircling said hub, said wall being connected with said hub and providing a zone of enlarged diameter around said member, and engaging means on said tubular member for engaging with said material while in its molten state to thereby secure said element on said member at said locus and prevent movement of said element relative to said member, said engaging means including a ferrule engaged at a first of its ends with the base of said member and engaged at its end opposite from said first end with said hub.
 2. A device as set forth in claim 1 wherein said element is provided with strand entraining means to engage a strand positioned proximate to said element and commence the strand winding on the bobbin when the bobbin is rotated.
 3. A device as set forth in claim 1 wherein said tubular meMber has a generally continuous taper from said apical end to an increased width at said base.
 4. A device as set forth in claim 1 wherein the outer surface of said wall is of generally frusto-conical shape.
 5. A device as set forth in claim 1 wherein said opposite end of said ferrule is flared outwardly to form a flange for engagement with said thermoplastic material as said hub is formed. 